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With the increasing demand for dynamic web service composition, traditional web service registries are no longer adequate in providing precise service selection. To address this problem, the paper proposes a fine-grain structural concept for traditional service registries, called web service community. Efficient semantic-level service enquiry and community management depend on context information...
Given the large amount of existing services and the diversified needs nowadays, it is time-consuming for end-users to find appropriate services. To help end-users obtain their desired services, context-aware systems provide a promising way to automatically search and recommend services using a user's context. However, existing context-aware techniques have limited support for dynamic adaption to newly...
Applications/services that cater to groups of users (or entities) in ubiquitous computing environments must utilise the concept of context-awareness in order to provide group adapted content or services. Most existing frameworks that support group applications/services focus on lower level issues such as group membership management or group communication, failing to give attention to context-awareness,...
According to the studies of cognitive psychology, object typicality plays an important role in concept representation in human cognitive process. However, computational ontologies cannot reflect the typicality of objects in concepts. Besides, context is important in measuring object typicality. In this paper, we present a formal model of context-aware ontology with multi-prototype concept and object...
As it is very difficult for learners to find the most proper contents according to their preferences from massive resources in U-Learning environment, the resource recommendation mechanism as a core component must be introduced. On the other hand, traditional recommendation mechanisms have been widely studied in e-business and personalized service fields in which most of them only take into account...
In this paper, we propose a sensor-based interaction for ubiquitous virtual reality (U-VR) systems that users are able to interact implicitly or explicitly with through a sensor. Due to the advances in sensor technology, we can utilize sensory data as a means of user interactions. To show the feasibility of the proposed method, we extend the Composar augmented reality (AR) authoring tool to add support...
Context-aware service platforms use context-aware policy management solutions to manage user's privacy preferences, to manage trust relationships, and to control access to the platform resources. However, existing context-aware policy management solutions focus on at most one policy management area (e.g. trust management, or privacy, or access control) and are difficult to integrate due to their unrelated...
Making Web services context-aware is a challenge. This is like making Web service expose appropriate behaviors in response to changes detected in the environment. Context awareness requires a review and extension of the current execution model of Web services. This paper discusses the seamless combination of context and policy to manage behaviors that Web services expose during composition and in...
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